in the sequence of class intervals 10 - 20, 20 - 30, 30 - 40, etc., the class that includes 20 is
in the sequence of class intervals 10 - 20, 20 - 30, 30 - 40, etc., the class that includes 20 is
Answer
Explanation:
Step1: Understand class - interval convention
In exclusive - type class intervals, the upper - limit of a class is not included in that class. So, 20 is not included in the class interval (10 - 20).
Step2: Identify the correct class
The next class interval is (20 - 30), and according to the convention of exclusive - type class intervals, 20 is included in the class interval (20 - 30).
Answer:
(20 - 30)